Dear All:
I have one question to consult, in REGISTER
request,
should the contact contain so many parameters as
listed
in SIP_URL.
SIP-URL = �sip:� [ userinfo �@� ] hostport
url-parameters [ headers ]
userinfo = [ user j telephone-subscriber ] [ �:�
password ]
user = *( unreserved j escaped j user-unreserved )
user-unreserved = �&� j �=� j �+� j �$� j �,� j �;� j
�?� j �/�
password = *( unreserved j escaped j
�&� j �=� j �+� j �$� j �,� )
hostport = host [ �:� port ]
host = hostname j IPv4address j IPv6reference
hostname = *( domainlabel �.� ) toplabel [ �.� ]
domainlabel = alphanum
j alphanum *( alphanum j �-� ) alphanum
toplabel = alpha j alpha *( alphanum j �-� ) alphanum
IPv4address = 1*3DIGIT �.� 1*3DIGIT �.� 1*3DIGIT �.�
1*3DIGIT
IPv6reference = �[� IPv6address �]�
IPv6address = hexpart [ �:� IPv4address ]
hexpart = hexseq j hexseq �::� [ hexseq ] j �::� [
hexseq ]
hexseq = hex4 *( �:� hex4)
hex4 = 1*4HEX
port = 1*DIGIT
url-parameters = *( �;� url-parameter)
url-parameter = transport-param j user-param j
method-param
j ttl-param j maddr-param j other-param
transport-param = �transport=�
( �udp� j �tcp� j �sctp� j �tls� j other-transport)
other-transport = token
user-param = �user=� ( �phone� j �ip� j other-user)
other-user = token
method-param = �method=� Method
ttl-param = �ttl=� ttl
maddr-param = �maddr=� host
other-param = pname [ �=� pvalue ]
pname = 1*paramchar
pvalue = 1*paramchar
paramchar = param-unreserved j unreserved j escaped
param-unreserved = �[� j �]� j �/� j �:� j �&� j �+� j
�$�
headers = �?� header *( �&� header )
header = hname �=� hvalue
hname = 1*( hnv-unreserved j unreserved j escaped )
hvalue = *( hnv-unreserved j unreserved j escaped )
hnv-unreserved = �[� j �]� j �/� j �?� j �:� j �+� j
�$�
My meaning is that is it necessary to have so many
parameters to be stored in realization?
I think some parameter such as Method-parameter,ttl
ttl-param = �ttl=� ttl, maddr-param = �maddr=� host
etc, there is no need for them to appear in REGISTER
request.
This is my opinion.
I am looking forwards to getting suggestion and idea
from every one!
Best Regards!
Yours: James
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